I believe, quite strongly, that the biggest determinant of state of mind are thoughts hidden deep with the "subconscious", thoughts of which we are likely not fully aware, nor fully "in control"
on top of that, I believe that the origin of many (if not most) of these "hidden thoughts in the subconscious" are the results of past life
that lie hidden beneath the surface, foggy fuzzy just out of reach
therefore, to me (and I do honestly believe this), the greatest tool for changing your state of mind -- and thus dramatically impacting your chances for abundance and prosperity
lie in accessing past life memories and helping make the unconscious "less unconscious"